Miles Per Hour to Kilometers Per Hour
1 mile / hour = 1.60934 kilometers per hour (km/h)
Convert miles per hour to kilometers per hour instantly. 1 mile / hour = 1.60934 kilometers per hour. Free, accurate, with conversion table and formula.
Mile / Hour (mph)
Kilometer / Hour (km/h)
| Unit | 1 mph equals |
|---|---|
| Meter / Second (m/s) | 0.44704 |
| Kilometer / Hour (km/h) | 1.60934 |
| Mile / Hour (mph) | 1 |
| Foot / Second (ft/s) | 1.46667 |
| Knot (kn) | 0.868977 |
| Mach (Ma) | 0.00130332 |
How to convert miles per hour to kilometers per hour
- 1Take your value in miles per hour (mph).
- 2Multiply by 1.60934.
- 3The result is your value in kilometers per hour (km/h).
Miles Per Hour to Kilometers Per Hour conversion table
| Miles Per Hour (mph) | Kilometers Per Hour (km/h) |
|---|---|
| 1 | 1.60934 |
| 2 | 3.21869 |
| 5 | 8.04672 |
| 10 | 16.0934 |
| 25 | 40.2336 |
| 50 | 80.4672 |
| 100 | 160.934 |
| 250 | 402.336 |
| 500 | 804.672 |
| 1,000 | 1,609.34 |
Frequently asked
How many kilometers per hour are in a mile / hour?
1 mile / hour equals 1.60934 kilometers per hour (km/h).
How do I convert miles per hour to kilometers per hour?
Multiply the number of miles per hour by 1.60934 to get kilometers per hour.
What is 10 miles per hour in kilometers per hour?
10 mph equals 16.09 km/h.
What is 100 miles per hour in kilometers per hour?
100 mph equals 160.9 km/h.
How do I convert kilometers per hour back to miles per hour?
Multiply kilometers per hour by 0.621371 (the reciprocal) or use the swap button above.
Where you'll actually use this
Speed measures distance covered per unit of time. Common units include km/h, mph, m/s, knots, and the speed of light (c).
- Driving
Speed limits use km/h in most countries; mph in the US, UK, and a few others.
- Aviation & maritime
Planes and ships report speed in knots (nautical miles per hour) — 1 kn ≈ 1.852 km/h.
- Running & cycling
Pace apps switch between min/km and min/mi; speed in km/h vs mph depending on locale.
Common mistakes to avoid
- kph isn't a real unit
The correct abbreviation is km/h. 'kph' is informal and not used in technical writing.
- Knots already includes 'per hour'
Saying 'knots per hour' is redundant — it's just 'knots'.
Did you know?
Mach 1 isn't a fixed speed — it depends on temperature. At sea level it's roughly 1,225 km/h, falling to ~1,062 km/h at altitude.
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